diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/corelib/global/qnumeric.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/corelib/global/qnumeric.h b/src/corelib/global/qnumeric.h index 63ba2bb378..49d795902c 100644 --- a/src/corelib/global/qnumeric.h +++ b/src/corelib/global/qnumeric.h @@ -114,9 +114,12 @@ Q_CORE_EXPORT quint64 qFloatDistance(double a, double b); // size_t. Implementations for 8- and 16-bit types will work but may not be as // efficient. Implementations for 64-bit may be missing on 32-bit platforms. -#if ((defined(Q_CC_INTEL) ? (Q_CC_INTEL >= 1800 && !defined(Q_OS_WIN)) : defined(Q_CC_GNU)) \ - && Q_CC_GNU >= 500) || __has_builtin(__builtin_add_overflow) +#if (((defined(Q_CC_INTEL) ? (Q_CC_INTEL >= 1800 && !defined(Q_OS_WIN)) : defined(Q_CC_GNU)) \ + && Q_CC_GNU >= 500) \ + || __has_builtin(__builtin_add_overflow)) \ + && !(QT_POINTER_SIZE == 4 && defined(Q_CC_CLANG)) // GCC 5, ICC 18, and Clang 3.8 have builtins to detect overflows +// 32 bit Clang has the builtins but tries to link a library which hasn't #define Q_INTRINSIC_MUL_OVERFLOW64 template <typename T> inline |